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Ringo2 optical polarimetry of blazars

Jermak, HE, Steele, IA, Lindfors, E, Hovatta, T, Nilsson, K, Lamb, GP, Mundell, C, De Almeida, UB, Berdyugin, A, Kadenius, V, Reinthal, R and Takalo, L (2016) Ringo2 optical polarimetry of blazars. Galaxies, 4 (4). ISSN 2075-4434

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Open Access URL: https://www.mdpi.com/2075-4434/4/4/52 (Published version)

Abstract

We present polarimetric and photometric observations from a sample of 15 γ-ray bright blazars with data from the Tuorla blazar monitoring program (KVA DIPOL) and Liverpool Telescope (LT) Ringo2 polarimeters (supplemented with γ-ray data from Fermi-LAT).We find that (1) The optical magnitude and γ-ray flux are positively correlated; (2) electric vector position angle rotations can occur in any blazar subclass; (3) there is no difference in the γ-ray flaring rates in the sample between subclasses; flares can occur during and outside of rotations with no preference for this behaviour; (4) the average degree of polarisation (P), optical magnitude and γ-ray flux are lower during a rotation compared with during non-rotation; (5) the number of observed flaring events and optical polarisation rotations are correlated and (6) the maximum observed P increases from ~10% to ~30% to ~40% for subclasses with synchrotron peaks at high, intermediate and low frequencies respectively. © 2016 by the authors.

Item Type: Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: MDPI
Date Deposited: 26 Mar 2019 09:42
Last Modified: 26 Mar 2019 09:42
DOI or Identification number: 10.3390/galaxies4040052
URI: http://researchonline.ljmu.ac.uk/id/eprint/10407

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